[pre-commit.ci] auto fixes from pre-commit.com hooks

pre-commit-ci[bot] · pre-commit-ci[bot] · commit 7e1843d1428e · 2025-10-30T19:57:01.000Z
diff --git a/stdlib/@tests/test_cases/check_mailbox.py b/stdlib/@tests/test_cases/check_mailbox.py
@@ -4,8 +4,10 @@
 def mbox1() -> mailbox.Mailbox:
     return mailbox.mbox("")
 
+
 def mbox2() -> mailbox.Mailbox[mailbox.mboxMessage]:
     return mailbox.mbox("")
 
+
 def mbox3() -> mailbox.Mailbox[mailbox.Message]:
     return mailbox.mbox("")
